Home / 13,446.82-18,559.05-7,780.90

Finding the Fourth Proportional to 13,446.82, 18,559.05 and 7,780.90

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Solution

The fourth proportional to 13,446.82, 18,559.05 and 7,780.90 is: 10,739.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,446.82 : 18,559.05 = 7,780.90 : x
  2. Step 2: Convert to fraction form
    13,446.82/18,559.05 = 7,780.90/x
  3. Step 3: Cross multiply
    13,446.82x = 18,559.05 × 7,780.90
  4. Step 4: Simplify right side
    13,446.82x = 144,406,112.15
  5. Step 5: Solve for x
    x = 144,406,112.15/13,446.82
  6. Step 6: Final answer
    x = 10,739.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.